Z28.8
⚠ Non-billable
Immunization not carried out for other reason
ICD-10-CM · FY2026 · Factors Influencing Health Status
Code
Z28.8
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Factors Influencing Health Status
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Z28.8?
ICD-10-CM code Z28.8 represents Immunization not carried out for other reason. It is a non-billable header code requiring a more specific subcategory in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.
Is Z28.8 billable?
No. Z28.8 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is Z28.8 in?
Z28.8 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.
Related codes in the Z28 category
Z28
Immunization not carried out and underimmunization status
Non-billable
Z28.0
Immunization not carried out because of contraindication
Non-billable
Z28.1
Immunization not carried out because of patient decision for reasons of belief or group pressure
Billable
Z28.2
Immunization not carried out because of patient decision for other and unspecified reason
Non-billable
Z28.3
Underimmunization status
Non-billable
Z28.9
Immunization not carried out for unspecified reason
Billable
Z28.01
Immunization not carried out because of acute illness of patient
Billable
Z28.02
Immunization not carried out because of chronic illness or condition of patient
Billable
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